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Derivative - Max and Min application!

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SGVaibhav:
i finally decided to ask my sir for help, but he is on vacation to malaysia.
i will ask my friends, because they use some different method.

Alpha:
Sorry, was in a hurry...

Okay, lemme try to explain what I used.

Point on curve closest to (18, 0).

In general, when you're required to find the closest distance, you look for a line perpendicular to your point.

If I give you a set of parallel lines, the closest distance between them is the perpendicular height.

That's what I used. The tangent to the point (you are required to find) on the curve must be perpendicular to the line joining the point required (on the curve) and (18, 0).

I tried to draw it... Don't laugh, did that too in a hurry. :P  ;D

SGVaibhav:
lol thanks for the effort , the drawing is good :D :P

Alpha:

--- Quote from: sgvaibhav on January 10, 2010, 10:36:30 am ---lol thanks for the effort , the drawing is good :D :P

--- End quote ---


Come-well! :D

Alpha:
Hey you got the answer??

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